Health Calculators Suite & Water Tracker

How Does BMI Work?

Body Mass Index (BMI) is a medical screening tool that estimates your body fat level relative to your height. It is calculated by dividing weight in kilograms by height in meters squared:

BMI results are categorized into four groups: Underweight (below 18.5), Normal weight (18.5 - 24.9), Overweight (25 - 29.9), and Obese (30 or above). Tracking BMI helps identify potential health risks related to body fat.

How is Ideal Weight Calculated?

Our Ideal Weight Calculator uses the medically accepted Devine Formula (developed in 1974) to estimate healthy adult body weights based on height and gender:

• Men: 50.0 kg + 2.3 kg per inch over 5 feet
• Women: 45.5 kg + 2.3 kg per inch over 5 feet

In addition, we display the healthy BMI boundaries (corresponding to a BMI of 18.5 to 24.9) as a range to ensure you have a complete overview.

Why Calculate Recommended Water Intake?

Water is essential for digestion, joints, cellular metabolism, and temperature regulation. A common medical guideline is that adults need approximately 35 ml of water per kilogram of body weight daily. For example, a person weighing 70 kg requires:

Our dynamic tracker updates your daily hydration target automatically whenever you adjust your weight, keeping your hydration in sync with your body mass.